A multiplex allele-specific real-time PCR assay for screening of ESR1 mutations in metastatic breast cancer

被引:15
|
作者
Wang, Ting [1 ]
Liu, Jin-Hui [1 ]
Zhang, Jie [1 ]
Wang, Le [1 ,2 ]
Chen, Chao [1 ]
Dai, Peng-Gao [1 ]
机构
[1] NW Univ Xian, Sch Life Sci, Natl Engn Res Ctr Miniaturized Detect Syst, Xian 710069, Peoples R China
[2] Xi An Jiao Tong Univ, Dept Oncol, Affiliated Hosp 1, Xian 710049, Peoples R China
基金
中国国家自然科学基金;
关键词
ESR1; Multiplex allele-specific PCR; Mutations; Breast cancer; ENDOCRINE RESISTANCE; BRAF; DNA;
D O I
10.1016/j.yexmp.2015.03.004
中图分类号
R36 [病理学];
学科分类号
100104 ;
摘要
Background: Acquired resistance to endocrine-based therapies occurs in virtually all estrogen receptor-alpha (ER alpha, encoded by ESR1) positive breast cancer patients. The underlying molecular mechanism is attributed to the activating mutations in ESR1. These mutations provide an exciting opportunity for the development of new antagonists that specifically inhibit the mutant proteins. Therefore, accurate detection of ESR1 mutations is of critical importance in clinical practice. Materials and methods: We carried out a single tube, multiplex allele-specific real-time PCR assay for the detection of four ESR1 mutations (Y537S, Y537C, Y537N, and D538G). Results: The assay was found to be highly specific and sensitive. With this assay, as low as 1% mutant DNA template in wild type DNA could be detected. Fifteen DNA samples were prepared from archived formalin-fixed paraffin-embedded metastatic breast cancer biopsies. They were further screened with this assay, and three samples were identified as ESR1 mutant. The results were validated with pyrosequencing and complete concordance was observed between the two assays. Conclusion: The multiplex allele-specific real-time PCR assay provides a rapid and reliable diagnostic tool for accurate detection of ESR1 mutations. This procedure may be used in the clinical treatment of breast cancer. (C) 2015 Elsevier Inc. All rights reserved.
引用
收藏
页码:152 / 157
页数:6
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